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A 25-year-old man is dead and two others injured, one seriously, after a shooting Wednesday night in the driveway of a group home for young adults with developmental disabilities in Joliet Township. (Published Thursday, Jul 21, 2011)

Updated at 11:06 PM CDT on Thursday, Jul 21, 2011

A 25-year-old man is dead and two others injured, one seriously, after a shooting Wednesday night in the driveway of a group home for young adults with developmental disabilities in Joliet Township.

The shooting occurred around 10 p.m. Wednesday on the 600 block of Adella Avenue near I-80 outside of Trinity Services Center, a nonprofit group providing residential services for young adults, according to the center's website.

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The Will County Sheriff's Department continues to search for the gunman or gunmen.

Ken Kaupas, a spokesman for the sheriff's department, told NBCChicago the victims were in a parked car waiting to pick up an employee at the center when the shooting occurred.

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Kaupas said the shooting appeared to be an "ambush-style attack" and that there may be multiple offenders.

A 25-year-old man sitting in the backseat of the car was shot multiple times and was killed. The coroner's office identified him as Grover Barefield of Joliet Township. A 20-year-old woman is in critical condition and a 23-year-old man was treated and released.

Trinity Services Executive Director Art Dykstra told NBCChicago none of the center's residents were injured. The victims knew a staff member, Dykstra said, but they are not residents.

A neighbor across the street from Trinity Services said that in the 40-plus years he's lived in the neighborhood, it's been very quiet and there never have been any issues with the facility.